Cooling device



Feb. 19 1924.

H. A. cARsTENs COOLING DEVICE Filed April 11, 1922 Patented Feb. 19, 1924.

unirse ,rares HENRY A. cnns'rnna or ACKLEY, IOWA.

COOLING DEVICE.

Application filed April. 11, 1922. Serial No. 551,512.

To all fio/0m t may concern.'

Be it known that 1, HENRY A. CARs'rENS, a citizen oi the United States, and resident oi" Ackley, in the coiuity of Hardin and State or" Iowa, have invented a certain new and useful Cooling Device, of which the following is a speciiication.

The object orl my invention is to provide a refrigerating apparatus for domestic use o1'l simple, durable and inexpensive construction that may be readily, and easily installed in a home, and which will preserve food for a maximum length of time and in good condition without the use of ice.

My device relates to that class of cold storage devices in which a tube is extended some distance down in the ground and the dumb waiter is placed therein and designed to be elevated above the tube so that access may be had to the contents and then loweredl to the bottom of the tube where the cold air settles by gravity and the temperature is lowered by evaporation of the water of condensation.

More specifically it is my object to provide a device or' this class in which the act of raising and lowering the dumb waiter into the tube will remove the foul air that has settled in the bottom of the tube, and replace it with fresh air from above and without raising the temperature of the air at the bottom of the tube to any appreciable extent, and

Further, to provide a device of this class in which the evaporation of the water of condensation is facilitated to lower the temperature, and also to provide a device of this class in which the water of condensation in normal quantities willnot aiect the circulation of the air.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claim and illustrated in the accompanying drawings, in which:

Figure 1 shows a front elevation of the complete apparatus embodying my invention with parts broken away to show structural details.

Figure 2 shows a sectional view on the line 2-2 of Figure 1, and

Figure 3 shows a sectional View on the line 3-8 of Figure 2.

Referring to the accompanying drawings,

I have used the reference numeral 10 to indicate a tube made water tight, opened at its top and closed at its bottom, and designed to be inserted to' a considerable distance into the ground. At the top oi' the tube there is an enclosed box 11 having a door 12 at the front. The interior of this box communicates with the open upper end of the tube and this openmg is normally covered by a removable cover 3 which may be moved from position at the top of the tube upwardly inside of the b ox 11. f

Arranged along side of the tube l1() is aV weight tube 14 of substantially the same length as the tube 10, and the weight tube is extended upwardly into the interior of the box 11 above its bottom. Mounted within the tube 10 is a dumb lwaiter 15 of ordinary construction which loosely iits the interior of the tube so that it may be readily moved up and down, and connected to the dumb waiter is a cable 16 which extends upwardly and passes through the cover 13 and around the pulleys 1.7 and then downwardly where it is attached'to -a weight 18 which substantially couliter-balances the weight of the dumb waiter.

Attached to one of the pulleys 17 is a crank 19 by which the pulleys may be operated i-rom the exterior ofY the box 11 to move the dumb waiter up and down. Arranged adjacent to the exterior of the tube 10 is a Ventilating tube 20, the upper end of which opens flush with the bottom of the interior of the box 11, and the lower end at 21 is provided vvith an elbow and opens into the tube 10 at a point spaced above the bottom thereof, as shown in Figure 3.

In practical operation and assuming that it is desired to place food in the dumb waiter and that the dumb waiter is at its upper limit of movement, then the door 12 is opened and the food is placed' in position and then the door is closed and the crank 19 manipulated to lower the dumb waiter to p0- sition near the bottom of the tube where the food will be preserved during hot Weather because of the accumulation of cold air at the bottom of the tube and under the surface of the ground.

If the dumb waiter has been left at the bottom of the tube for a'period of time and assuming that it is desired to remove food from it, the operator manipulates the crank 19'and elevates the dumb waiter to a readily accessible position inside of the box 11, and

when it isvelevated the door 12 is opened.H

During this operation partially cool air from the interior of the box 11 is drawn down through the Ventilating tube and iills the lower interior of the tube 10, and when the dumb waiter is again lowered the door 12 may be left open and Vwhen thisis done the air from the bottom of the tube 10 is forced outwardly through the Ventilating' tube and to a point exteriorto the box l1, so that anyV foul or tainted airin the bottom of the tube Awill be discharged to the outside atmosphere, and'in theevent that it should be found thatthere is aV 'considerable amount offouly or tained air iticanbe pumped out by 'simply raising and lowering the dumb waiter while the door 12 is open, and

if desired, the door 12 may be left closed and then the temperature of the interior of vthe apparatus'is not increased'by the raising and lowering of the dumb waiter. As the dumb waiter ascends the cool air is forced intothexbox 11 vand when the dumb waiter descends cool airfrom the interior of the box `11 would be drawn down to the bottom ofthe tube 10.

In devices of `this kind there is during warm weather a'considerable accumulation of lwater of condensation in lthe bottom of the tube Aand the evaporation of this water adds materially in this ,cooling process. However, by my improved arrangement this water of condensation will not retard the circulation of'air rwhich will pass over the top ofthe body of water and by its movement facilitate the quent cooling.

I claim as my invention:

A cooling device comprising a tube open at its top and closed at the bottom, and designed evaporation and conse- Vtombe. inserted in the ground, a box at the top of the tube and in communication therewith, said box being substantially air tight and provided on one side with a door opening, a door for closing said door opening, a

dumb waiter mounted within the tube and capableof moving from position within'the Vboxto position at the'lower end of the tube,

a counterbalancing weight for the dumb waiter,a tube parallel with the main tube waiter descends, air within the bottom or'- the main tube may pass freely up through said Ventilating tube into the box at the top, and as the dumb waiter is being elevated, air within the box mayfreely pass-to the bottom of the tube, substantially as and for .the purposes stated.

Des Moines, Iowa, March 16, 1922. y HENRY lx. cABs'rENs. 

